摘要
建立在有效应力基础上的非饱和土强度理论公式虽得到了普遍的认同,但其参数确定的复杂性却妨碍了它在工程中的应用.而包含了吸附强度的总强度指标也能反映非饱和土的强度特性,且易于获取.为此,通过研究用常规直剪仪确定非饱和土总强度指标的试验方法,得到了宁明原状膨胀土抗剪强度指标随饱和度和含水量的变化而变化的规律,探讨了非饱和膨胀土总应力强度指标在路堑边坡稳定性分析中的应用.
The shear strength expression of unsaturated soil based on the effective stress has been accepted widely, but the complexity in determining its parameters makes it difficult to be applied in engineering practice. However, the total strength as well as the suctional strength can also reflect the feature of unsaturated expansive soil strength, and is easy to be obtained. For this purpose, the method of determining total shear strength of unsaturated expansive soil with conventional direct shear apparatus has been studied, the relation between total shear strength and saturation degree or moisture content has been acquired, and the application of total shear strength index in the analysis of expansive soil cut slope stability was discussed in this paper.
出处
《长沙理工大学学报（自然科学版）》
CAS
2004年第2期1-6,共6页
Journal of Changsha University of Science and Technology:Natural Science
基金
交通部西部交通建设科技资助项目(2002318000)
